president obama's inauguration falls on the dr. martin luther king holiday. the question, if they could have met, what would the leader of the civil rights movement who was murdered in memphis have to say to president obama about guns and violence in our society? >> claiborne carson was just 19 years old when he stood on the washington mall on a hot august afternoon and listened to martin luther king industry his dream for america. >> four years ago he was back on the mall in the freezing call to watch barack obama take the oath of office. like many who were involved in what carson calls the movement, he wondered what now? >> now that he has the power of the presidency, what is he going to do to bring king's dream into reality? >> carson believes dr. king would urge the president to take on the harder, more complex issues underlying gun violence. >> the problem with violence is not simply a problem of availability of guns. it's a climate. it's a culture. >> for king it was an issue of social justice. >> you know, i think what he wo